Pour the oil into a medium-sized skillet or saucepan.
Add the butter, if using.
Heat the pan over medium heat until the butter has melted.
Add the onion and garlic to the cold oil, together with a sprinkle of sea salt.
Sauté over medium-high heat until the onion and garlic have softened.
Add the canned tomatoes, together with the sugar, salt and some pepper to taste.
Simmer the mixture over low-medium heat for about 20 minutes.
Stir the mixture frequently, and use a wooden spoon to help break down the tomatoes.
If the mixture has thickened too much, thin it with some boiling water.
Taste for seasoning. Depending on the acidity of your canned tomatoes, you might need to add some more sugar.
Stir through the chopped herbs, and reserve some herbs for garnishing.
Kitchen Notes
IN A HURRY? Simply leave out the onions, and use tomato passata (tomato purée) for a shorter cooking time.
USE DIFFERENT SPICES Some suggestions for variations include: * Add 1-2 teaspoons of crushed red peppers (dried chilli flakes) to the onions and garlic for a spicy kick. * Add 1 teaspoon of dried Italian herbs to the onions and garlic. * Add or substitute fresh marjoram or oregano.
ADD VEGETABLES Add some chopped vegetables to the onions and garlic, such as: * courgette (zucchini), cut into large slices * aubergine (eggplant), cut into small dice * capsicums (bell peppers), cut into large dice
OVEN & STOVE TEMPERATURES All recipes on this website have been tested on an induction stove and/or with a conventional oven (i.e. an oven without fan). All recipes on this website use temperatures for a conventional oven, unless otherwise mentioned. Convection ovens (i.e. fan-forced ovens) are typically 20°C/70°F hotter than conventional ovens, but please check your manufacturer’s handbook.